Pulp-vat for paper-making machines.



G. SCHACHTI PULP VAT FOR PAPER MAKING MACHINES. APPLICATION FILED JUNE 25. i913.

1 1 62, 107. I Patented Nov. 30, 1915.

.lfl-fi it Inventor YQFZZX, Gustmv sdwaw -X W by GUSTAV SQHACHT, OF HALLE-CRbLLWITZ, GERMANY.

PUi JP-VAT FOB PAPER-MAKING MACHINES.

Specification of Letters Patent.

Patented Nov. 30, 1915.

Application filed June 25, 1918. Serial No. 775,650.

To all whom it may concern:

7 Be it known that I, GUSTAV SCHACHT, a subject of the German Emperor, residing at Halle-Crollwitz, in Germany, have invented certain new and useful Improvements in Pulp-Vats for Paper-Making Machines, of which the following is a specification.

This invention relates to pulp-vats, for paper-making machines, of the type wherein a making-cylinder, working at one side of a partition in the vat, throws the pulp over a ridge or wall near one end of the vat, whereupon the pulp flows on the other side of the partition down a sloping floor to the other end of the vat, and returns to the cylinder.

It has heretofore been the practice to have the upper edges of the vat-walls about level with the trunnions of the cylinder, the height of the walls being equal to about half the diameter of the cylinder, and inasmuch as for practical. reasons the diameter of the cylinder must be kept within moderate limits the walls have been made comparatively low. This restricts the capacity of the vat, and moreover restricts the slope of the floor,

so that the circulation of the pulp is not sorapid as might be desired. In addition, the hood generally fitted to the wall, above the ridge referred to, is so close to that part of the cylinder which throws up the pulp, that a large quantity of pulp temporarily adheres thereto, and becomes partly dry, ultimately dropping off in lumps into the liquid pulp in the vat.

The object of my invention is to remove these disadvantages. To this end I make the outer wall of the vat rise to a leved somewhat above the top of the cylinder, and also place the crest of the ridge at or near the level of the top of the cylinder.

The invention is illustrated in the accom panying drawings, in which Figure 1 is a plan view of the vat, Fig. 2 a vertical longitudinal section thereof, and Fig. 3 a vertical cross-section.

In the drawings, a designates the wall of the vat, b the partition, 0 the horizontal part of the floor on one side of the partition, and d the sloping floor on the other side of the partition. .The partition 6 leaves, at each end, a passa e for the circulation of the pulp. A sha ley thereon, and supported by bearings 7 outside the'vat, passes through the vat, with g, driven by means of a pulthe wall of which it makes tight joints. This shaft supports the making cylinder 72. over the member e with which the cylinder coacts. As shown, the upper edge of the wall a lies well above the level of the top ofthe cylinder. Near the right-hand end of the partition I) (Figs. 1 and 2) the floor 0 rises from the part below the cylinder to form a ridge or transverse wall In, the upper edge or crest of which lies nearly at the level of the top of the cylinder. At the side remote from the cylinder the ridge only drops to a level slightly above the height of the upper end of the slope (1. Above this ridge or transverse Wall is a hood H rests on the wall a and partition 6, to retain pulp flung high by the cylinder. A curved extension of this hood lies over the cylinder itself.

It will be seen that the sloping floor d rises to approximately the level at which the shaft 9 is placed. This would obviously not be practicable if the vat-wall did not extend considerably above that level. With the active circulation due to this increased slope the efliciency of the cylinder action is so increased that the large capacity of the vat, due to its high walls, can be utilized to a very large extent.

What I claim as my invention and desire to secure by Letters Patent of the United States is 2-- In a paper pulp vat the combination of an outer wall, a vertical partition leaving passages between said outer wall and its ends, a floor part on one side of said partition having a slope in the direction of the latter, a floor part on the other side of said partition, having a transverse ridge which rises on one side from the bottom of the vat and falls on the othergside approximately to the level of the upper end of said slope, and a making cylinder adjacent the first-mentioned side of said ridge, having its axis approximately level with the upper end of said slope, said ridge rising to a level near the level of the top of said cylinder, and said outer wall and partition rising above the top of said cylinder.

In witness whereof I have signed this specification in the presence of two witnesses.

GUSTAV SCHACHT.

Witnesses I MoRrrz SPREER, RUDOLPH FRICKE. 

